QRP Labs QMX+ vs Elecraft KX2
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QRP Labs QMX+ or Elecraft KX2? I’ve put the two radios side by side: data from the manufacturers’ datasheets and photos at the same scale. The QRP Labs QMX+ comes out better for 6 m power and transmit current draw; the Elecraft KX2 for HF power, a second receiver, weight and memory channels.
QRP LabsQMX+
HF · 6 m5 W0.6 kg
ElecraftKX2
HF10 Wtuner0.4 kg
Specs side by side
| QRP LabsQMX+▲ 2 | ElecraftKX2▲ 4 | |
|---|---|---|
| Bands and modes | ||
| Transmit bands | HF 1.8–29.7 MHz50–52 MHz | HF 3.5–29.7 MHz (no 160 m) |
| Receive range | 160–6 m bands (also tunes outside the bands) | 0.5–32 MHz |
| Modes | SSBCWFSK | SSBCWAMFMPSKRTTY |
| Transmit power | ||
| HF | 5 W | 10 W ▲ |
| 50 MHz (6 m) | 5 W ▲ | — |
| Receiver | ||
| Construction | SDR, quadrature detector + DSP (STM32); kit or ready-built | SDR, 32-bit DSP |
| Second receiver | — | dual watch ±23 kHz (not a separate receiver) |
| Spectrum and waterfall | — | — |
| Features | ||
| Antenna tuner | — | internal KXAT2 option |
| Display | 2×16-character LCD, yellow-green; CW decoder | monochrome LCD |
| LAN / remote operation | — | — |
| USB | USB‑C: CAT + audio (24‑bit/48 kHz sound card) | KXUSB cable (CAT, no audio) |
| SD card | — | — |
| Antenna connectors | 1× BNC | 1× BNC |
| Power and case | ||
| Power | 12 V DC (or 9 V — chosen during assembly), external power supply | 8–15 V DC or optional internal battery |
| Transmit current draw | 0.7 A ▲ | 2 A |
| Dimensions | 106 × 55 × 146 mmwith optional case | 147 × 72 × 40 mmwidth × height × depth |
| Weight | 0.6 kgwith case | 0.4 kg ▲ |
| Other | ||
| Memory channels | 16 | 150 ▲ |
| Release | 2024 | 2016 |
Data: manufacturers’ spec sheets and manuals · as of 31.10.2026
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